#encoding:utf-8
import threading
import inspect
import ctypes
def _async_raise(tid, exctype):
  """raises the exception, performs cleanup if needed"""
  if not inspect.isclass(exctype):
    raise TypeError("Only types can be raised (not instances)")
  res = ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, ctypes.py_object(exctype))
  if res == 0:
    raise ValueError("invalid thread id")
  elif res != 1:
    # """if it returns a number greater than one, you're in trouble,
    # and you should call it again with exc=NULL to revert the effect"""
    ctypes.pythonapi.PyThreadState_SetAsyncExc(tid, 0)
    raise SystemError("PyThreadState_SetAsyncExc failed")
class Thread(threading.Thread):
	def _get_my_tid(self):
		"""determines this (self's) thread id"""
		if not self.isAlive():
			raise threading.ThreadError("the thread is not active")
		if hasattr(self, "_thread_id"):
			return self._thread_id
		for tid, tobj in threading._active.items():
			if tobj is self:
				self._thread_id = tid
				return tid
		raise AssertionError("could not determine the thread's id")
	def raise_exc(self, exctype):
		"""raises the given exception type in the context of this thread"""
		_async_raise(self._get_my_tid(), exctype)
	def terminate(self):
		"""raises SystemExit in the context of the given thread, which should
		cause the thread to exit silently (unless caught)"""
		self.raise_exc(SystemExit)
